Improved nail-machine



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a L o Hm 'O a on g K Q e e 6l/ l I p l a f y E l :lf -I N, PErERs, PHOTO-LITHUGRAFHEH. WASHING N-PETERS, PHOMYMOGPAPHER. WASHINGTON. C.

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Letters .Patent No. 94,290, dated August 31, 1869.

IMPROVED NAIL-MACHINE. f

The Schedule referred to in these Lettera Patent and making part of the same.

To Vall whom it may concern l Be it known that I, F. DAVISON, of Richmond, in the county of Henrico, and State of Virginia, have invented a new and useful Improvement in Nail-Mai chines; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying draw; ing, forming part of this specification.

This invention relates to improvements in nailmachines, such as heretofore patented to me, by Letters Patent numbered 7 7,262 land 80,150.

The object of the present invention is to provide an improved feeding-apparatus, whereby" the plates will be self-actingly fed in'succession from a feed-box containing a number of plates.

Also, an improved arrangement of vibrating feeding-apparatus, whereby the plates are so presented as to insure the disposing of a sufficient amount of metal at the wide ends of the blanks, and proper delivery of them to, the griping-dies for the heads, which are formed alternately on yopposite sides of the giiping-dies.

Also, an improved arrangement of the vibrating feeding-box support; and, also, an improved arrangement of carrier and guides, for conveying the blanks from the cutters to the griping-dies.

Figure l represents a front elevation of my improved machine, with a part of the casing or front plate removed.

v Figure 2 represents a plan view of the same.

'Figure 3 represents a section on the line x42: of

Figure 4 represents a section on the line y-y of fig. 3, looking in the direction of the arrow a.

Similar letters of reference indicate corresponding parts.

A represents the feed-box, standing in an inclined position on the vibrating lever B.

It is provided with anti-friction rollers, C, at the5 side to which the plates, being placed endwise in the box and atwise toward the said rollers, will gravitate, and, with feeding-rollers I), near the bottom, having grooved or roughened surfaces, and operated by a ratchet, F, which is set into motion by the returnmovement of the moving die-holder G.

H represents a shelfin the said box, above the feed rollers, descending toward the back part.

As many plates as can be supported endwise onthis shelf may be placed in the box at once, sidewise against the rollers C, and the one' next the rollers- C will have just room enough to 'slide past the lower edge of the shelfH to the feed-rollers, so that as the top of one plate is fed down past the shelf the lower end of the next succeeding plate will be. delivered into the spacebelow the shelf, and follow the preceding plate, and so on, as long as the box is kept supplied, and the machine in motion.

The said feeding-box is vibrated, alternately with the cutting, each way from the vertical line, to form wedgeshaped blanks, by the vibrating bar B, which is worked by cams, I I', one at each end.

The shafts of these cams are driven by bevel-gears from the driving-shaft K, and make one revolution to two of the latter, and one cam throws up when the other throws down.

It is necessary, in order to provide sufficient metal to form the heads, that the wide ends of the blanks project from the griping-dies toward the headers to some extent, more than they would if the feeding-box were pivoted upon a xed fulcrum..

To cause the lower end of the plate to be thrown out from the centre on the side from which the said wide ends are cut, so that the said blanks will so project from the gripers, I have arranged the vibrating bar upon a shifting fulcrum, by means of a pair of connecting-straps, swivelled at each end, respectively to the bar and block, so that the lower end of the plate will be thrown from the=perpendicular line of the said pivot-joints, on the side of the wide end, as much as is due to the relative distance between the two cen? tres of motion; and, to relieve the said pivot-jointv Vfrom the weight of the feeding-box, and the Wear which would be cause'd by supporting the saidv weight instead of the angular bar shown in patent, July 2l, 1868,'I have now interposed a curved block, M, for the supportof the vibrating bar B and the feed-box, the latter being supported on the said bar.

The curvature of this block, and that ofthe curved recess in the bar B,'tting thereon, will depend upon the relative position of the said centres of motion; v

The present improvement in the carrier and guides consistsv in the arrangement of the bent bifuroated plate N, and slide 0, relatively to the recessed moving cutter P, spring-nipper guide Q, and guides Q.

The said movable cutter is recessed on the lower side, as shown at It, to allow the end of the carrier N space to withdraw behind thel blank, which falls, after being out, on the spring-nipper guide Q, for` pushing it forward between the end guides Q', for the blanks.

The carrier delivers the blanks into the grooves or sockets of the revolving griper T, and sliding griper U, w-here they are headed by the headers V, and discharged by the spring-nipper Q, which also acts as a discharger. V

These grasping and heading-dies, and the springnipper, are all similar in their construction and operation to those shown in the aforesaid patents granted C, substantially as specified.

2. The arrangement of the curved-block M, swivelled straps, and vibrating bm B, substantially as specied, for the purpose set forth.

3. The arrangement of the bifurcated bent carrier N, recessed die P, spring-nipper Q, and guides Q', substantially as speoied.

' F. DAVlSON.

Witnesses GHAs. AUNSPAUGH, O. G. HOFFMAN. 

